(19)

(11)

EP 1 286 804 A1

(12)

(43) Date of publication: 05.03.2003 Bulletin 2003/10 (21) Application number: 00970326.5 (22) Date of filing: 18.10.2000

(51) International Patent Classification (IPC)7: B23K 20/12 (86) International application number: PCT/NO0000/343 (87) International publication number: WO 0102/8731 (26.04.2001 Gazette 2001/17)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 19.10.1999 NO 995092 (71) Applicant: NORSK HYDRO ASA 0240 Oslo (NO)	(72) Inventors: BERSAAS, Jan, Charles N-5535 Haugesund (NO) OOSTERKAMP, Antonie N-4250 Kopervik (NO) OOSTERKAMP, Ljiljana, Djapic N-4250 Kopervik (NO) (74) Representative: Kastel, Stefan Dipl.-Phys. et al Flügel, Preissner & Kastel,Postfach 81 05 06 81905 München 81905 München (DE)